I modeled the wristrest after dimensions and pictures I found online as close to the real deal.

My “prototype” printed in PLA+ was strong enough to become my final solution.

Print the outside/inside part laying on the side so the layer orientation fits (outside needs supports)

The spindle for height adjustment is a 6mm allthread, to connect the 2 parts use M8 bolts and nuts.

When printing the knob, add a pause on the layer where the nuthole neds and insert the M6 nut.

A detailed description of the build is on my blog:

https://f16simulator.net/wp/en/2023/11/07/wrist-rest-the-prototype/

https://f16simulator.net/wp/en/2023/11/30/wristrest-done/